title: Tris(4-formyl-phen-yl)phosphane oxide tetra-hydro-furan hemisolvate.
abstract: The title compound, C21H15O4P·0.5C4H8O, contains an ordered phosphane oxide in a general position and a tetra-hydro-furan solvent mol-ecule disordered about a twofold axis. All three aldehyde substituents are nearly coplanar with their attached benzene rings, with C-C-C-O torsion angles in the range 1.64 (17)-4.24 (19)°. All three have different conformations with respect to the P=O group, one syn, one anti, and one gauche. Two of the aldehyde substituents form inter-molecular C-H⋯O contacts.
authors.affiliation: Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803-1804, USA.
authors.forename: James
authors.initials: J
authors.lastname: Kakoullis
authors.forename: Frank R
authors.initials: FR
authors.lastname: Fronczek
authors.forename: Andrew W
authors.initials: AW
authors.lastname: Maverick